
As you can see, the accents, in the french version of Cyberduck, like é, è, à, ê, etc. are not well displayed. Does anybody know why ?

From http://cyberduck.ch/help/en/problems/index.htmlSpecial characters such as Umlaute aren't displayed correctly in the browser.
Try to change the character encoding used. See 'View' → 'Text Encoding'. Try UTF-8 (the default), ISO-8859-1 and Windows-1252.